Jennifer Leigh "Jen" Selter (born August 8, 1993) is an American Internet celebrity and fitness model. She attracted significant media attention for her debut at a young age, initially sharing photos of her buttocks on the photo-sharing app Instagram.she widely credited with popularizing the term " belfie", earning her the title of "Belfie Queen" across social media. As of June 2025, Jen Selter had 13.6 million followers on Instagram. Selter grew up Jewish.